[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH RFC V6 0/11] Paravirtualized ticketlocks

* Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:

> > Care to back that up with numbers and proper trace evidence 
> > instead of handwaving?
> E.g. my plumbers presentations on lock and mm scalability from 
> last year has some graphs that show this very clearly, plus 
> some additional data on the mutexes. This compares to the 
> glibc futex locks, which perform much better than the kernel 
> mutex locks on larger systems under higher contention

If you mean these draft slides:


it has very little verifiable information in it. It just 
cryptically says lock hold time "microbenchmark", which might or 
might not be a valid measurement.

You could have been honest and straightforward in your first 

 "I ran workload X on machine Y, and got results Z."

Instead you are *hindering* the discussion:

> Given your tone I will not supply an URL. [...]

If you meant the above URL then it's not the proper numbers 
Thomas asked for, just some vague slides. If you meant something 
else then put up or shut up.



Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.